/*-
 * Copyright (c) 2003, 2004, 2005, 2007 Lev Walkin <vlm@lionet.info>.
 * All rights reserved.
 * Redistribution and modifications are permitted subject to BSD license.
 */
/*
 * Declarations internally useful for the ASN.1 support code.
 */
#ifndef _ASN_INTERNAL_H_
#define _ASN_INTERNAL_H_

#include "asn_application.h" /* Application-visible API */

#ifndef __NO_ASSERT_H__ /* Include assert.h only for internal use. */
#include <assert.h>     /* for assert() macro */
#endif

#ifdef __cplusplus
extern "C" {
#endif

/* Environment version might be used to avoid running with the old library */
#define ASN1C_ENVIRONMENT_VERSION 924    /* Compile-time version */
int get_asn1c_environment_version(void); /* Run-time version */

#define CALLOC(nmemb, size) calloc(nmemb, size)
#define MALLOC(size) malloc(size)
#define REALLOC(oldptr, size) realloc(oldptr, size)
#define FREEMEM(ptr) free(ptr)

#define asn_debug_indent 0
#define ASN_DEBUG_INDENT_ADD(i) \
  do {                          \
  } while (0)

/*
 * A macro for debugging the ASN.1 internals.
 * You may enable or override it.
 */
#ifndef ASN_DEBUG       /* If debugging code is not defined elsewhere... */
#if EMIT_ASN_DEBUG == 1 /* And it was asked to emit this code... */
#ifdef __GNUC__
#ifdef ASN_THREAD_SAFE
/* Thread safety requires sacrifice in output indentation:
 * Retain empty definition of ASN_DEBUG_INDENT_ADD. */
#else /* !ASN_THREAD_SAFE */
#undef ASN_DEBUG_INDENT_ADD
#undef asn_debug_indent
int asn_debug_indent;
#define ASN_DEBUG_INDENT_ADD(i) \
  do {                          \
    asn_debug_indent += i;      \
  } while (0)
#endif /* ASN_THREAD_SAFE */
#define ASN_DEBUG(fmt, args...)                        \
  do {                                                 \
    int adi = asn_debug_indent;                        \
    while (adi--) fprintf(stderr, " ");                \
    fprintf(stderr, fmt, ##args);                      \
    fprintf(stderr, " (%s:%d)\n", __FILE__, __LINE__); \
  } while (0)
#else /* !__GNUC__ */
void ASN_DEBUG_f(const char* fmt, ...);
#define ASN_DEBUG ASN_DEBUG_f
#endif /* __GNUC__ */
#else  /* EMIT_ASN_DEBUG != 1 */
#ifdef EMIT_ASN_DEBUG_EXTERN
extern inline void ASN_DEBUG(const char* fmt, ...);
#else
static inline void ASN_DEBUG(const char* fmt, ...) { (void)fmt; }
#endif
#endif /* EMIT_ASN_DEBUG */
#endif /* ASN_DEBUG */

/*
 * Invoke the application-supplied callback and fail, if something is wrong.
 */
#define __ASN_E_cbc(buf, size) (cb((buf), (size), app_key) < 0)
#define _ASN_E_CALLBACK(foo) \
  do {                       \
    if (foo) goto cb_failed; \
  } while (0)
#define _ASN_CALLBACK(buf, size) _ASN_E_CALLBACK(__ASN_E_cbc(buf, size))
#define _ASN_CALLBACK2(buf1, size1, buf2, size2) \
  _ASN_E_CALLBACK(__ASN_E_cbc(buf1, size1) || __ASN_E_cbc(buf2, size2))
#define _ASN_CALLBACK3(buf1, size1, buf2, size2, buf3, size3)             \
  _ASN_E_CALLBACK(__ASN_E_cbc(buf1, size1) || __ASN_E_cbc(buf2, size2) || \
                  __ASN_E_cbc(buf3, size3))

#define _i_ASN_TEXT_INDENT(nl, level)                             \
  do {                                                            \
    int __level = (level);                                        \
    int __nl = ((nl) != 0);                                       \
    int __i;                                                      \
    if (__nl) _ASN_CALLBACK("\n", 1);                             \
    if (__level < 0) __level = 0;                                 \
    for (__i = 0; __i < __level; __i++) _ASN_CALLBACK("    ", 4); \
    er.encoded += __nl + 4 * __level;                             \
  } while (0)

#define _i_INDENT(nl)                                \
  do {                                               \
    int __i;                                         \
    if ((nl) && cb("\n", 1, app_key) < 0) return -1; \
    for (__i = 0; __i < ilevel; __i++)               \
      if (cb("    ", 4, app_key) < 0) return -1;     \
  } while (0)

/*
 * Check stack against overflow, if limit is set.
 */
#define _ASN_DEFAULT_STACK_MAX (30000)
static inline int _ASN_STACK_OVERFLOW_CHECK(asn_codec_ctx_t* ctx) {
  if (ctx && ctx->max_stack_size) {
    /* ctx MUST be allocated on the stack */
    ptrdiff_t usedstack = ((char*)ctx - (char*)&ctx);
    if (usedstack > 0) usedstack = -usedstack; /* grows up! */

    /* double negative required to avoid int wrap-around */
    if (usedstack < -(ptrdiff_t)ctx->max_stack_size) {
      ASN_DEBUG("Stack limit %ld reached", (long)ctx->max_stack_size);
      return -1;
    }
  }
  return 0;
}

#ifdef __cplusplus
}
#endif

#endif /* _ASN_INTERNAL_H_ */
